A more thorough explanation:

A perfect grant is an agreement that creates a right of any description other than the one held by the person who made the agreement. This can include leases, easements, charges, patents, franchises, powers, and licenses. It can also refer to the formal transfer of real property, which is done through a document called a deed. A perfect grant is one where the grantor has done everything required to pass a complete title, and the grantee has done everything required to receive and enjoy the property in fee.

• A lease agreement that allows someone to use a property for a certain period of time is a type of perfect grant.
• A deed that transfers ownership of a house from one person to another is also a perfect grant.
• On the other hand, an imperfect grant is one that requires the grantor to do something before the title passes to another, or one that does not convey all rights and complete title against both private persons and government.

These examples illustrate how a perfect grant is a complete transfer of rights or ownership, while an imperfect grant may have limitations or conditions attached to it.